Regs:
1) Check first how much the LDS will charge you to fix those regs.
2) If they can get the parts.
3) Will they let you buy the parts and they provide labour.
I happened once to be charge 120$ to repair a reg that had FREE parts, sold it and went to another LDS that charges me 60$. See the difference? Be careful.
BCD:
-That looks like a sweet BCD. Good luck
Wetsuit:
-Good call, I can't fit into my wetsuit that I bought in college 4-5 years ago, so yeah. Good Call.
Computer:
-I bought the SubGear XP10, rebrande Uwatec Aladin. Does nitrox and sells at 250$ MSRP. Find a ScubaPro dealer and if he charges more than 250$ tell him he's higher than MSRP. It's on ScubaLab. (Also the connection to PC is Infrared so a 20$ adapter works, not a 150$ cable)
SUBGEAR
60:Second ScubaLab: SubGear XP-10 Computer | Scuba Diving Magazine
Din to Yoke:
I have thought the same thing. I have bought DIN and use the adapter, it's bulky.
I'd say buy the yoke one and keep it like that since you'll be renting tanks with YOKE on it for a year or more
But that's just a preference.